an action that is performed without conscious thought as a response to a stimulus

a newborn baby is equipped with basic reflexes

a thing which is determined by and reproduces the essential features or qualities of something else

politics was no more than a reflex of economics

a reflected source of light

the reflex from the window lit his face

(of an action) performed without conscious thought as an automatic response to a stimulus

sneezing is a reflex action

(of an angle) exceeding 180°

(of light) reflected